Telephone signaling device.



PATENTED MAR. 5, 1907.

K. WEMAN. TELEPHONE-SIGNALING DEVICE.

APPLICATION FILED JAN. 23, 1906.

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ATTORNEY WITNESSES 1n: NURRIS PETERS 00., wAsmNswN, n. c.

KLAS WEMAN, OF BUFFALO, NEW YORK.

TELEPHONE SIGNALING DEVICE.

Specification of Letters Patent.

Patented March 5, 1907.

Application filed January 28, 1906. Serial No. 297,464.

To aZZ whom it may concern.-

Be it known that I, KLAs WEMAN, a citizen of the United States, residing at Buffalo, New York, have invented certain new and useful Improvements in Telephone Signaling Devices, of which the following is a specification.

- the normally immovable parts.

Further objects of the invention will here inafter be explained.

In the accompanying drawing, illustrating the preferred form of my invention, Figure 1 is a front elevational view of a signaling instrument embodying my improvements.

Fig. 2 is a side elevational view, and Fig. 3 is a top plan view with the yoke removed.

Referring to the drawings, the electromagnetic coils are designated 1 and are provided with the usual end rings 2'and cores 3.

The electromagnets are securely mounted upon the base 4 by means of screws 3 The base 4 has an upturned edge 5, to which the lower legs of permanent magnets 6 are fastened by means of screws 7. Resting upon the shorter 10 's of the electromagnets 6 is a yoke 8, the ydke and legs being held together by screws 9.

The armature is designated 10 and is piv otally held in a bridge 11 by means of screws 12. Arranged above the armature 10 is a curved spring 13, held within the bridge 11 by means of a rivet, having a reduced shank 15, which passes through apertures in the bridge 11 and spring 13. The lower end of I the rivet is mushroomed at 16 to keep the parts through which it passes well together. The rivet 14 is longitudinally bored at 17 and internally screw-threaded and is adapted to receive the screw 18, which passes through a countersunk screw-hole in the yoke 8.

To prevent the ends of the armature 10 from sticking to the poles of the cores 3, I provide below the armature a thin sheet spring 19, which is secured to the armature by means of the tongue 32, having the striker 23 at one end. The tongue 22 at its end opposite the hammer 23 is screw-threaded and passes through an aperture in the spring 19 into a threaded hole at approximately the center of the armature 10. When the tongue 22 is screwed tightly into the armature 10, the spring 19 is firmly held in position between the tongue and armature.

20 and 21 indicate apertures in the spring 13 at the points where the screws 9 pass therethrough.

In assembling the instrument the base 4, magnets 6, and yoke 8 are secured together, forming a substantially rigid frame in which the armature movement, which has been previously assembled, may be mounted. The screw 18 serves the double purpose of holding the armature movement to the preformed frame, as well as regulating the stroke of the tongue 22. The function of the curved spring 13 is to hold the armature movement in its proper position relatively to the electromagnets and to prevent lateral displacement of said armature movement. When the screw 18 is tightened or rotated clownwardly, the armature movement will be drawn upwardly, causing the extension of curved spring 13, and turning the screw in the reverse direction will cause the downward movement of the armature and will permit the return of spring 13 to its normal or substantially normal form. Throughout the movement of the armature in both directions the screws 9 will project through the oblong apertures 20 and 21 in the spring, these apertures being made of a sufficient length to have the screws project therethrough when the spring is either extended by being drawn upwardly or is in its normal or substantially normal form.

It will be understood that by tightening the screw 18 the armature 10 will be drawn further away from the ends of the pole-pieces, while rotating the screw in the opposite direction will bring the armature closer to the ends of the pole-pieces. In this manner the range of movement of the tongue and hammer is controlled.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a device of the character described, the combination of a base member, permanent magnets secured thereto, a yoke arranged transversely over the top of said permanent magnets, an adjusting-screw in said yoke, a rivet embracing said screw and having its lower end mushroomed, a bridge carried by said rivet, an armature held in said bridge, and electromagnets mounted upon said base member, the relative distance of the armature from the electromagnets being adjustable by turning said adjusting-screw, substantially as described.

2. In a device of the character described, the combination of a base member, perma. nent magnets associated therewith and a yoke arranged transversely over said permanent magnets, an adjusting-screw in said yoke, a bridge held by said adjusting-screw, an armature retained within said bridge, electromagnets mounted upon said base member and means for preventing lateral displacement of said armature and appurtenant parts, said means comprising a curved spring held against rotatory and lateral move ment, substantially as described.

3. In a device of the character described, the combination of a base member having electromagnets mounted thereon, permanent magnets secured to said base member and having legs turned in over the tops of said electromagnets, a yoke arranged across the legs of said permanent magnets, screws having ends projecting beyond the lower faces of said legs to secure the yoke to the legs of said permanent magnets, an adjusting-screw in said yoke, a rivet, embracing said adjustingscrew having an enlarged head and a mush roomed end, a curved spring and a bridge carried by said rivet between its enlarged head and mushroomed end, means for guiding the longitudinal movement of said spring, an armature retained in said bridge and adapted to have oscillating motion therein, a tongue carrying a hammer at its end adapted to be secured to said armature, and a flat spring retained between said tongue and armature and being provided to prevent the armature from sticking to the pole-pieces of said electromagnets, substantially as described.

4. In a device of the character described, the combination of electromagnets, a yoke arranged thereover, a bridge depending from said yoke, an adj Listing-screw passing through the yoke and being adapted to raise and lower the bridge, an armature pivotally retained in said bridge, and means for preventing displacement of said armature consisting of a curved spring held against lateral and rotatory movement substantially as described.

5. In a device of the character described, the combination of electromagnets, a yoke arranged thereover, an adjusting-screw passing through said yoke, a bridge movably held by said adjusting-screw, an armature pivotally retained in the bridge, and means for preventing displacement of the armature, said means comprising an apertured curved spring and guidescrews extending from said yoke through the apertures in said curved spring, substantially as described.

6. In a device of the character described, the combination of electromagnets, a yoke arranged thereover, an adjusting -screw passing through said yoke, a rivet having an enlarged head and mushroomed end, embracing said adjusting-screw, a bridge carried by said rivet, an armature pivotally retained by the bridge, and means for preventing displacement of the armature, said means consisting of a curved spring provided with an aperture near each end thereof, and a guide-screw extending from the said yoke into each aperture, substantially as described.

In testimony whereof I aifix my signature in presence of two witnesses.

KLAS WEMAN.

Witnesses:

ALFRED LARssAN, HENRIETTA BABINGTON. 

